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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 0 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> OA/OC REPORT <br /> Attention Vic Cherven BTEX Analyzed 07-09-96 <br /> Upgradient Environmental Matrix Water <br /> 1017 26th Street <br /> Saccramento, CA 95816 <br /> Project# 96006/Valley Motors <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 0 005 0 005 0 005 0 005 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> i <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 1000/0 99% 100% 1000/0 <br /> Laboratory Control Spike 99% 99% 100% 101% <br /> Duplicate <br /> ppb=parts per billion a ug/L—microgram per liter <br /> ND =Not detested Compound(s)may be present at concentrations below the reporting Amit. <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike Duplicates were each spiked with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURES <br /> STEX--Benzene,toluene,ethylbenzene,and total xylene Isomers(BTEX)are measured by extraction using EPA Method 5030 followed by analysis <br /> using EPA Method 602 which utilizes a gas chromatogaph(GC)equipped with a phototonvatron detector(PID) <br /> 07-19-96 <br /> abo tory Representative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THESTATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certifiwatwn Na 1760 2119) <br />